Waterproofing compound and process of making the same



Patented Dec. 4, 1928.

' UNITED STATES Enwm c. n. LORD, or wasnmoron; ms'rmo'r or commnm.

WATERPROOFING COMPOUND AND PROCESS OF MAKING -'.lHE

No Drawing,

. Application fled September 1, 1928. Serial No. 808,617.

(enamel) man rimacr or men a, 1888, as manna nan. so, was; are do. 157.

This application is made under the act approved A ril 30, 1928, and the invention heregovernmental purposes without payment to me of any royalty thereon. q My invention relates to waterproofing foundation's, walls, cellars, vaults, cisterns and buildings: for whatever purpose by means of my new compound, a concentrated solution of a mixture of a bitumen and waxes in an organic solvent, which is employed either hot or cold. Heretofore, coal tar has 11 used for such purposes, but it iswell kno n that 15 the oils contained therein evaporated u on exposllre to the air, causing the tar to isintegrate, powder and chip. As bituminous material for m new compound I use water gas tar, obtain by the manufacture of illuminating gas, either in a crude state or refined by distillation. I heat this tar to a temperature of about 125 F. and dissolve therein crude paraflin or other waxes to the extent of ten per cent, more or less, by weight of tar. To this solution I add'from 10 to 15 per cent coal tar naphtha, or a similar solvent, to cause the compound to assume a thin liquid condition u n cooling (specific gravity 1.02 at 75 F. It isunderstood, however, that the an addition of naphtha or other solvent is not essential, and the tar-paraffin mixture may be employed without the solvent ifheated to a thin liquid condition; r

- The chief advantage in the use of water gas tar in place of coal tar or other bitumens lies in its; exceptional penetrating properties.-

This tar has beenwidely used for priming coats for concrete structures but has been found ineffective in repelling moisture unless 40 inc 'descnbed in the above specifications.

with paraflin or other waxes as i In practice 500 pounds of tar (specific gravity below 1.08) and pounds of paraflin are compounded with 75 pounds of-naphtha at about 125 F.

The compound may be applied cold with brush or spray and it is essential that the structure treated should be sufliciently dry to permit the application of at least four coats, each coat to completely absorbed before .0 the succeeding coat is put on. If desired, a seal coat of asphalt, pitch or linseed oil paint maybe a plied directly upon the compound after the atter has become thoroughly incorporated in the concrete.

The essential waterproofing properties of my new compound are caused by the para-fiin wax and water gas tar, which, when properly fluxed with a common solvent, enter the concrete to an appreciable extent ,4,, inch or 50 more), thereby closing all capillary pores and completely preventing the ingress of moistum v I claim:

1. A new waterproofing compound which comprises a mixture of water gas tar and parafiin wax dissolvedin coal tar naphtha, the mixture in liquid form and of a specific gravity of'approximately 1.02.

2. A process ,for the manufacture of awaterproofing compound which comprises themixing of water gas tar and paraflin wait dissolved in coal tainaphtha, and the reducg of the mixture to liquid form of a specificv gravity of about 1.02.

3. A new waterproofing compound which comprises a mixture of water gas tar and paraflin wax.

EDWIN c. E. LORD. 1 i 

